I have a problem that I have. I have a chain store and each store has 4 surveillance cameras, all of which use Hikvision 7100 and 7800 series recorders. All of them are bound to a mobile phone number ...
[i=s]This post was last edited by lehuijie on 2019-11-24 22:08[/i]I have the board in hand but I don't know what to evaluate, so I'll start with the ADC acquisition photoresistor routine.
First look a...
[i=s]This post was last edited by lugl4313820 on 2022-5-9 15:59[/i]In order to verify the accuracy of ADC, I made a voltmeter today:
The voltage input IO is GPIOB1, which is channel 9 as shown in the ...
In July, my country's battery production was 97.8GWh, up 8.6% from the previous month and 33.1% from the previous year. Among them, the installed capacity of power batteries was 41.6GWh...[Details]
There has been no news about BlackBerry phones for a long time, but I didn’t expect that they still broke a big news - not only is BlackBerry phones not dead, but they will also release 5G BlackBerry...[Details]
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1 Introduction
Civilian non-power nuclear technology is a high-tech technology encouraged by the state. Among them, nuclear logging technology is one of the cutting-edge logging technolo...[Details]
introduction
There are two main types of air suspension: passive suspension and controllable electronic suspension. Passive suspension can suppress and reduce the dynamic load and vibratio...[Details]
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1. Preparation of the device under test (1) Before measuring, the device under test must be disconnected and grounded for short-circuit discharge. It is not allowed to measure the insulation resistan...[Details]
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Electronic detonators are generally divided into three types: (1) electronic detonators with programmable electric initiation, where the delay time is set at the blasting site according to the require...[Details]
Direct access in user mode, use the driver dev-interface provided by the kernel . Note that do not use the read() and write() functions directly, but use i2c_smbus_write_word_data and i2c_smbus_r...[Details]
On February 26, Fujing Technology released its 2019 performance report, stating that in 2019, the company achieved operating income of 501.1457 million yuan, an increase of 2.00% over the previous y...[Details]
STVD is not used by many people, and STVD assembly is used by even fewer people. However, I like STM8 assembly myself. Now I work in computer software, and I hardly use MCU. But I don't want to forge...[Details]
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